ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs

This patch removes support for ARMv3 CPUs, which haven't worked properly
for quite some time (see the FIXME comment in arch/arm/mm/fault.c).  The
only V3 parts left is the cache model for ARMv3, which is needed for some
odd reason by ARM740T CPUs, and being able to build with -march=armv3,
which is required for the RiscPC platform due to its bus structure.

Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 3 insertions, 816 deletions

diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 0ade0acc1ed9..992769ae2599 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -17,30 +17,13 @@ lib-y		:= backtrace.o changebit.o csumipv6.o csumpartial.o   \
 		   call_with_stack.o
 
 mmu-y	:= clear_user.o copy_page.o getuser.o putuser.o
-
-# the code in uaccess.S is not preemption safe and
-# probably faster on ARMv3 only
-ifeq ($(CONFIG_PREEMPT),y)
-  mmu-y	+= copy_from_user.o copy_to_user.o
-else
-ifneq ($(CONFIG_CPU_32v3),y)
-  mmu-y	+= copy_from_user.o copy_to_user.o
-else
-  mmu-y	+= uaccess.o
-endif
-endif
+mmu-y	+= copy_from_user.o copy_to_user.o
 
 # using lib_ here won't override already available weak symbols
 obj-$(CONFIG_UACCESS_WITH_MEMCPY) += uaccess_with_memcpy.o
 
-lib-$(CONFIG_MMU) += $(mmu-y)
-
-ifeq ($(CONFIG_CPU_32v3),y)
-  lib-y	+= io-readsw-armv3.o io-writesw-armv3.o
-else
-  lib-y	+= io-readsw-armv4.o io-writesw-armv4.o
-endif
-
+lib-$(CONFIG_MMU)		+= $(mmu-y)
+lib-y				+= io-readsw-armv4.o io-writesw-armv4.o
 lib-$(CONFIG_ARCH_RPC)		+= ecard.o io-acorn.o floppydma.o
 lib-$(CONFIG_ARCH_SHARK)	+= io-shark.o
 
diff --git a/arch/arm/lib/io-readsw-armv3.S b/arch/arm/lib/io-readsw-armv3.S
deleted file mode 100644
index 88487c8c4f23..000000000000
--- a/arch/arm/lib/io-readsw-armv3.S
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- *  linux/arch/arm/lib/io-readsw-armv3.S
- *
- *  Copyright (C) 1995-2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-
-.Linsw_bad_alignment:
-		adr	r0, .Linsw_bad_align_msg
-		mov	r2, lr
-		b	panic
-.Linsw_bad_align_msg:
-		.asciz	"insw: bad buffer alignment (0x%p, lr=0x%08lX)\n"
-		.align
-
-.Linsw_align:	tst	r1, #1
-		bne	.Linsw_bad_alignment
-
-		ldr	r3, [r0]
-		strb	r3, [r1], #1
-		mov	r3, r3, lsr #8
-		strb	r3, [r1], #1
-
-		subs	r2, r2, #1
-		moveq	pc, lr
-
-ENTRY(__raw_readsw)
-		teq	r2, #0		@ do we have to check for the zero len?
-		moveq	pc, lr
-		tst	r1, #3
-		bne	.Linsw_align
-
-.Linsw_aligned:	mov	ip, #0xff
-		orr	ip, ip, ip, lsl #8
-		stmfd	sp!, {r4, r5, r6, lr}
-
-		subs	r2, r2, #8
-		bmi	.Lno_insw_8
-
-.Linsw_8_lp:	ldr	r3, [r0]
-		and	r3, r3, ip
-		ldr	r4, [r0]
-		orr	r3, r3, r4, lsl #16
-
-		ldr	r4, [r0]
-		and	r4, r4, ip
-		ldr	r5, [r0]
-		orr	r4, r4, r5, lsl #16
-
-		ldr	r5, [r0]
-		and	r5, r5, ip
-		ldr	r6, [r0]
-		orr	r5, r5, r6, lsl #16
-
-		ldr	r6, [r0]
-		and	r6, r6, ip
-		ldr	lr, [r0]
-		orr	r6, r6, lr, lsl #16
-
-		stmia	r1!, {r3 - r6}
-
-		subs	r2, r2, #8
-		bpl	.Linsw_8_lp
-
-		tst	r2, #7
-		ldmeqfd	sp!, {r4, r5, r6, pc}
-
-.Lno_insw_8:	tst	r2, #4
-		beq	.Lno_insw_4
-
-		ldr	r3, [r0]
-		and	r3, r3, ip
-		ldr	r4, [r0]
-		orr	r3, r3, r4, lsl #16
-
-		ldr	r4, [r0]
-		and	r4, r4, ip
-		ldr	r5, [r0]
-		orr	r4, r4, r5, lsl #16
-
-		stmia	r1!, {r3, r4}
-
-.Lno_insw_4:	tst	r2, #2
-		beq	.Lno_insw_2
-
-		ldr	r3, [r0]
-		and	r3, r3, ip
-		ldr	r4, [r0]
-		orr	r3, r3, r4, lsl #16
-
-		str	r3, [r1], #4
-
-.Lno_insw_2:	tst	r2, #1
-		ldrne	r3, [r0]
-		strneb	r3, [r1], #1
-		movne	r3, r3, lsr #8
-		strneb	r3, [r1]
-
-		ldmfd	sp!, {r4, r5, r6, pc}
-
-
diff --git a/arch/arm/lib/io-writesw-armv3.S b/arch/arm/lib/io-writesw-armv3.S
deleted file mode 100644
index 49b800419e32..000000000000
--- a/arch/arm/lib/io-writesw-armv3.S
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- *  linux/arch/arm/lib/io-writesw-armv3.S
- *
- *  Copyright (C) 1995-2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-
-.Loutsw_bad_alignment:
-		adr	r0, .Loutsw_bad_align_msg
-		mov	r2, lr
-		b	panic
-.Loutsw_bad_align_msg:
-		.asciz	"outsw: bad buffer alignment (0x%p, lr=0x%08lX)\n"
-		.align
-
-.Loutsw_align:	tst	r1, #1
-		bne	.Loutsw_bad_alignment
-
-		add	r1, r1, #2
-
-		ldr	r3, [r1, #-4]
-		mov	r3, r3, lsr #16
-		orr	r3, r3, r3, lsl #16
-		str	r3, [r0]
-		subs	r2, r2, #1
-		moveq	pc, lr
-
-ENTRY(__raw_writesw)
-		teq	r2, #0		@ do we have to check for the zero len?
-		moveq	pc, lr
-		tst	r1, #3
-		bne	.Loutsw_align
-
-		stmfd	sp!, {r4, r5, r6, lr}
-
-		subs	r2, r2, #8
-		bmi	.Lno_outsw_8
-
-.Loutsw_8_lp:	ldmia	r1!, {r3, r4, r5, r6}
-
-		mov	ip, r3, lsl #16
-		orr	ip, ip, ip, lsr #16
-		str	ip, [r0]
-
-		mov	ip, r3, lsr #16
-		orr	ip, ip, ip, lsl #16
-		str	ip, [r0]
-
-		mov	ip, r4, lsl #16
-		orr	ip, ip, ip, lsr #16
-		str	ip, [r0]
-
-		mov	ip, r4, lsr #16
-		orr	ip, ip, ip, lsl #16
-		str	ip, [r0]
-
-		mov	ip, r5, lsl #16
-		orr	ip, ip, ip, lsr #16
-		str	ip, [r0]
-
-		mov	ip, r5, lsr #16
-		orr	ip, ip, ip, lsl #16
-		str	ip, [r0]
-
-		mov	ip, r6, lsl #16
-		orr	ip, ip, ip, lsr #16
-		str	ip, [r0]
-
-		mov	ip, r6, lsr #16
-		orr	ip, ip, ip, lsl #16
-		str	ip, [r0]
-
-		subs	r2, r2, #8
-		bpl	.Loutsw_8_lp
-
-		tst	r2, #7
-		ldmeqfd	sp!, {r4, r5, r6, pc}
-
-.Lno_outsw_8:	tst	r2, #4
-		beq	.Lno_outsw_4
-
-		ldmia	r1!, {r3, r4}
-
-		mov	ip, r3, lsl #16
-		orr	ip, ip, ip, lsr #16
-		str	ip, [r0]
-
-		mov	ip, r3, lsr #16
-		orr	ip, ip, ip, lsl #16
-		str	ip, [r0]
-
-		mov	ip, r4, lsl #16
-		orr	ip, ip, ip, lsr #16
-		str	ip, [r0]
-
-		mov	ip, r4, lsr #16
-		orr	ip, ip, ip, lsl #16
-		str	ip, [r0]
-
-.Lno_outsw_4:	tst	r2, #2
-		beq	.Lno_outsw_2
-
-		ldr	r3, [r1], #4
-
-		mov	ip, r3, lsl #16
-		orr	ip, ip, ip, lsr #16
-		str	ip, [r0]
-
-		mov	ip, r3, lsr #16
-		orr	ip, ip, ip, lsl #16
-		str	ip, [r0]
-
-.Lno_outsw_2:	tst	r2, #1
-
-		ldrne	r3, [r1]
-
-		movne	ip, r3, lsl #16
-		orrne	ip, ip, ip, lsr #16
-		strne	ip, [r0]
-
-		ldmfd	sp!, {r4, r5, r6, pc}
diff --git a/arch/arm/lib/uaccess.S b/arch/arm/lib/uaccess.S
deleted file mode 100644
index 5c908b1cb8ed..000000000000
--- a/arch/arm/lib/uaccess.S
+++ /dev/null
@@ -1,564 +0,0 @@
-/*
- *  linux/arch/arm/lib/uaccess.S
- *
- *  Copyright (C) 1995, 1996,1997,1998 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- *  Routines to block copy data to/from user memory
- *   These are highly optimised both for the 4k page size
- *   and for various alignments.
- */
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-#include <asm/errno.h>
-#include <asm/domain.h>
-
-		.text
-
-#define PAGE_SHIFT 12
-
-/* Prototype: int __copy_to_user(void *to, const char *from, size_t n)
- * Purpose  : copy a block to user memory from kernel memory
- * Params   : to   - user memory
- *          : from - kernel memory
- *          : n    - number of bytes to copy
- * Returns  : Number of bytes NOT copied.
- */
-
-.Lc2u_dest_not_aligned:
-		rsb	ip, ip, #4
-		cmp	ip, #2
-		ldrb	r3, [r1], #1
-USER(	TUSER(	strb)	r3, [r0], #1)			@ May fault
-		ldrgeb	r3, [r1], #1
-USER(	TUSER(	strgeb) r3, [r0], #1)			@ May fault
-		ldrgtb	r3, [r1], #1
-USER(	TUSER(	strgtb) r3, [r0], #1)			@ May fault
-		sub	r2, r2, ip
-		b	.Lc2u_dest_aligned
-
-ENTRY(__copy_to_user)
-		stmfd	sp!, {r2, r4 - r7, lr}
-		cmp	r2, #4
-		blt	.Lc2u_not_enough
-		ands	ip, r0, #3
-		bne	.Lc2u_dest_not_aligned
-.Lc2u_dest_aligned:
-
-		ands	ip, r1, #3
-		bne	.Lc2u_src_not_aligned
-/*
- * Seeing as there has to be at least 8 bytes to copy, we can
- * copy one word, and force a user-mode page fault...
- */
-
-.Lc2u_0fupi:	subs	r2, r2, #4
-		addmi	ip, r2, #4
-		bmi	.Lc2u_0nowords
-		ldr	r3, [r1], #4
-USER(	TUSER(	str)	r3, [r0], #4)			@ May fault
-		mov	ip, r0, lsl #32 - PAGE_SHIFT	@ On each page, use a ld/st??t instruction
-		rsb	ip, ip, #0
-		movs	ip, ip, lsr #32 - PAGE_SHIFT
-		beq	.Lc2u_0fupi
-/*
- * ip = max no. of bytes to copy before needing another "strt" insn
- */
-		cmp	r2, ip
-		movlt	ip, r2
-		sub	r2, r2, ip
-		subs	ip, ip, #32
-		blt	.Lc2u_0rem8lp
-
-.Lc2u_0cpy8lp:	ldmia	r1!, {r3 - r6}
-		stmia	r0!, {r3 - r6}			@ Shouldnt fault
-		ldmia	r1!, {r3 - r6}
-		subs	ip, ip, #32
-		stmia	r0!, {r3 - r6}			@ Shouldnt fault
-		bpl	.Lc2u_0cpy8lp
-
-.Lc2u_0rem8lp:	cmn	ip, #16
-		ldmgeia	r1!, {r3 - r6}
-		stmgeia	r0!, {r3 - r6}			@ Shouldnt fault
-		tst	ip, #8
-		ldmneia	r1!, {r3 - r4}
-		stmneia	r0!, {r3 - r4}			@ Shouldnt fault
-		tst	ip, #4
-		ldrne	r3, [r1], #4
-	TUSER(	strne) r3, [r0], #4			@ Shouldnt fault
-		ands	ip, ip, #3
-		beq	.Lc2u_0fupi
-.Lc2u_0nowords:	teq	ip, #0
-		beq	.Lc2u_finished
-.Lc2u_nowords:	cmp	ip, #2
-		ldrb	r3, [r1], #1
-USER(	TUSER(	strb)	r3, [r0], #1)			@ May fault
-		ldrgeb	r3, [r1], #1
-USER(	TUSER(	strgeb) r3, [r0], #1)			@ May fault
-		ldrgtb	r3, [r1], #1
-USER(	TUSER(	strgtb) r3, [r0], #1)			@ May fault
-		b	.Lc2u_finished
-
-.Lc2u_not_enough:
-		movs	ip, r2
-		bne	.Lc2u_nowords
-.Lc2u_finished:	mov	r0, #0
-		ldmfd	sp!, {r2, r4 - r7, pc}
-
-.Lc2u_src_not_aligned:
-		bic	r1, r1, #3
-		ldr	r7, [r1], #4
-		cmp	ip, #2
-		bgt	.Lc2u_3fupi
-		beq	.Lc2u_2fupi
-.Lc2u_1fupi:	subs	r2, r2, #4
-		addmi	ip, r2, #4
-		bmi	.Lc2u_1nowords
-		mov	r3, r7, pull #8
-		ldr	r7, [r1], #4
-		orr	r3, r3, r7, push #24
-USER(	TUSER(	str)	r3, [r0], #4)			@ May fault
-		mov	ip, r0, lsl #32 - PAGE_SHIFT
-		rsb	ip, ip, #0
-		movs	ip, ip, lsr #32 - PAGE_SHIFT
-		beq	.Lc2u_1fupi
-		cmp	r2, ip
-		movlt	ip, r2
-		sub	r2, r2, ip
-		subs	ip, ip, #16
-		blt	.Lc2u_1rem8lp
-
-.Lc2u_1cpy8lp:	mov	r3, r7, pull #8
-		ldmia	r1!, {r4 - r7}
-		subs	ip, ip, #16
-		orr	r3, r3, r4, push #24
-		mov	r4, r4, pull #8
-		orr	r4, r4, r5, push #24
-		mov	r5, r5, pull #8
-		orr	r5, r5, r6, push #24
-		mov	r6, r6, pull #8
-		orr	r6, r6, r7, push #24
-		stmia	r0!, {r3 - r6}			@ Shouldnt fault
-		bpl	.Lc2u_1cpy8lp
-
-.Lc2u_1rem8lp:	tst	ip, #8
-		movne	r3, r7, pull #8
-		ldmneia	r1!, {r4, r7}
-		orrne	r3, r3, r4, push #24
-		movne	r4, r4, pull #8
-		orrne	r4, r4, r7, push #24
-		stmneia	r0!, {r3 - r4}			@ Shouldnt fault
-		tst	ip, #4
-		movne	r3, r7, pull #8
-		ldrne	r7, [r1], #4
-		orrne	r3, r3, r7, push #24
-	TUSER(	strne) r3, [r0], #4			@ Shouldnt fault
-		ands	ip, ip, #3
-		beq	.Lc2u_1fupi
-.Lc2u_1nowords:	mov	r3, r7, get_byte_1
-		teq	ip, #0
-		beq	.Lc2u_finished
-		cmp	ip, #2
-USER(	TUSER(	strb)	r3, [r0], #1)			@ May fault
-		movge	r3, r7, get_byte_2
-USER(	TUSER(	strgeb) r3, [r0], #1)			@ May fault
-		movgt	r3, r7, get_byte_3
-USER(	TUSER(	strgtb) r3, [r0], #1)			@ May fault
-		b	.Lc2u_finished
-
-.Lc2u_2fupi:	subs	r2, r2, #4
-		addmi	ip, r2, #4
-		bmi	.Lc2u_2nowords
-		mov	r3, r7, pull #16
-		ldr	r7, [r1], #4
-		orr	r3, r3, r7, push #16
-USER(	TUSER(	str)	r3, [r0], #4)			@ May fault
-		mov	ip, r0, lsl #32 - PAGE_SHIFT
-		rsb	ip, ip, #0
-		movs	ip, ip, lsr #32 - PAGE_SHIFT
-		beq	.Lc2u_2fupi
-		cmp	r2, ip
-		movlt	ip, r2
-		sub	r2, r2, ip
-		subs	ip, ip, #16
-		blt	.Lc2u_2rem8lp
-
-.Lc2u_2cpy8lp:	mov	r3, r7, pull #16
-		ldmia	r1!, {r4 - r7}
-		subs	ip, ip, #16
-		orr	r3, r3, r4, push #16
-		mov	r4, r4, pull #16
-		orr	r4, r4, r5, push #16
-		mov	r5, r5, pull #16
-		orr	r5, r5, r6, push #16
-		mov	r6, r6, pull #16
-		orr	r6, r6, r7, push #16
-		stmia	r0!, {r3 - r6}			@ Shouldnt fault
-		bpl	.Lc2u_2cpy8lp
-
-.Lc2u_2rem8lp:	tst	ip, #8
-		movne	r3, r7, pull #16
-		ldmneia	r1!, {r4, r7}
-		orrne	r3, r3, r4, push #16
-		movne	r4, r4, pull #16
-		orrne	r4, r4, r7, push #16
-		stmneia	r0!, {r3 - r4}			@ Shouldnt fault
-		tst	ip, #4
-		movne	r3, r7, pull #16
-		ldrne	r7, [r1], #4
-		orrne	r3, r3, r7, push #16
-	TUSER(	strne) r3, [r0], #4			@ Shouldnt fault
-		ands	ip, ip, #3
-		beq	.Lc2u_2fupi
-.Lc2u_2nowords:	mov	r3, r7, get_byte_2
-		teq	ip, #0
-		beq	.Lc2u_finished
-		cmp	ip, #2
-USER(	TUSER(	strb)	r3, [r0], #1)			@ May fault
-		movge	r3, r7, get_byte_3
-USER(	TUSER(	strgeb) r3, [r0], #1)			@ May fault
-		ldrgtb	r3, [r1], #0
-USER(	TUSER(	strgtb) r3, [r0], #1)			@ May fault
-		b	.Lc2u_finished
-
-.Lc2u_3fupi:	subs	r2, r2, #4
-		addmi	ip, r2, #4
-		bmi	.Lc2u_3nowords
-		mov	r3, r7, pull #24
-		ldr	r7, [r1], #4
-		orr	r3, r3, r7, push #8
-USER(	TUSER(	str)	r3, [r0], #4)			@ May fault
-		mov	ip, r0, lsl #32 - PAGE_SHIFT
-		rsb	ip, ip, #0
-		movs	ip, ip, lsr #32 - PAGE_SHIFT
-		beq	.Lc2u_3fupi
-		cmp	r2, ip
-		movlt	ip, r2
-		sub	r2, r2, ip
-		subs	ip, ip, #16
-		blt	.Lc2u_3rem8lp
-
-.Lc2u_3cpy8lp:	mov	r3, r7, pull #24
-		ldmia	r1!, {r4 - r7}
-		subs	ip, ip, #16
-		orr	r3, r3, r4, push #8
-		mov	r4, r4, pull #24
-		orr	r4, r4, r5, push #8
-		mov	r5, r5, pull #24
-		orr	r5, r5, r6, push #8
-		mov	r6, r6, pull #24
-		orr	r6, r6, r7, push #8
-		stmia	r0!, {r3 - r6}			@ Shouldnt fault
-		bpl	.Lc2u_3cpy8lp
-
-.Lc2u_3rem8lp:	tst	ip, #8
-		movne	r3, r7, pull #24
-		ldmneia	r1!, {r4, r7}
-		orrne	r3, r3, r4, push #8
-		movne	r4, r4, pull #24
-		orrne	r4, r4, r7, push #8
-		stmneia	r0!, {r3 - r4}			@ Shouldnt fault
-		tst	ip, #4
-		movne	r3, r7, pull #24
-		ldrne	r7, [r1], #4
-		orrne	r3, r3, r7, push #8
-	TUSER(	strne) r3, [r0], #4			@ Shouldnt fault
-		ands	ip, ip, #3
-		beq	.Lc2u_3fupi
-.Lc2u_3nowords:	mov	r3, r7, get_byte_3
-		teq	ip, #0
-		beq	.Lc2u_finished
-		cmp	ip, #2
-USER(	TUSER(	strb)	r3, [r0], #1)			@ May fault
-		ldrgeb	r3, [r1], #1
-USER(	TUSER(	strgeb) r3, [r0], #1)			@ May fault
-		ldrgtb	r3, [r1], #0
-USER(	TUSER(	strgtb) r3, [r0], #1)			@ May fault
-		b	.Lc2u_finished
-ENDPROC(__copy_to_user)
-
-		.pushsection .fixup,"ax"
-		.align	0
-9001:		ldmfd	sp!, {r0, r4 - r7, pc}
-		.popsection
-
-/* Prototype: unsigned long __copy_from_user(void *to,const void *from,unsigned long n);
- * Purpose  : copy a block from user memory to kernel memory
- * Params   : to   - kernel memory
- *          : from - user memory
- *          : n    - number of bytes to copy
- * Returns  : Number of bytes NOT copied.
- */
-.Lcfu_dest_not_aligned:
-		rsb	ip, ip, #4
-		cmp	ip, #2
-USER(	TUSER(	ldrb)	r3, [r1], #1)			@ May fault
-		strb	r3, [r0], #1
-USER(	TUSER(	ldrgeb) r3, [r1], #1)			@ May fault
-		strgeb	r3, [r0], #1
-USER(	TUSER(	ldrgtb) r3, [r1], #1)			@ May fault
-		strgtb	r3, [r0], #1
-		sub	r2, r2, ip
-		b	.Lcfu_dest_aligned
-
-ENTRY(__copy_from_user)
-		stmfd	sp!, {r0, r2, r4 - r7, lr}
-		cmp	r2, #4
-		blt	.Lcfu_not_enough
-		ands	ip, r0, #3
-		bne	.Lcfu_dest_not_aligned
-.Lcfu_dest_aligned:
-		ands	ip, r1, #3
-		bne	.Lcfu_src_not_aligned
-
-/*
- * Seeing as there has to be at least 8 bytes to copy, we can
- * copy one word, and force a user-mode page fault...
- */
-
-.Lcfu_0fupi:	subs	r2, r2, #4
-		addmi	ip, r2, #4
-		bmi	.Lcfu_0nowords
-USER(	TUSER(	ldr)	r3, [r1], #4)
-		str	r3, [r0], #4
-		mov	ip, r1, lsl #32 - PAGE_SHIFT	@ On each page, use a ld/st??t instruction
-		rsb	ip, ip, #0
-		movs	ip, ip, lsr #32 - PAGE_SHIFT
-		beq	.Lcfu_0fupi
-/*
- * ip = max no. of bytes to copy before needing another "strt" insn
- */
-		cmp	r2, ip
-		movlt	ip, r2
-		sub	r2, r2, ip
-		subs	ip, ip, #32
-		blt	.Lcfu_0rem8lp
-
-.Lcfu_0cpy8lp:	ldmia	r1!, {r3 - r6}			@ Shouldnt fault
-		stmia	r0!, {r3 - r6}
-		ldmia	r1!, {r3 - r6}			@ Shouldnt fault
-		subs	ip, ip, #32
-		stmia	r0!, {r3 - r6}
-		bpl	.Lcfu_0cpy8lp
-
-.Lcfu_0rem8lp:	cmn	ip, #16
-		ldmgeia	r1!, {r3 - r6}			@ Shouldnt fault
-		stmgeia	r0!, {r3 - r6}
-		tst	ip, #8
-		ldmneia	r1!, {r3 - r4}			@ Shouldnt fault
-		stmneia	r0!, {r3 - r4}
-		tst	ip, #4
-	TUSER(	ldrne) r3, [r1], #4			@ Shouldnt fault
-		strne	r3, [r0], #4
-		ands	ip, ip, #3
-		beq	.Lcfu_0fupi
-.Lcfu_0nowords:	teq	ip, #0
-		beq	.Lcfu_finished
-.Lcfu_nowords:	cmp	ip, #2
-USER(	TUSER(	ldrb)	r3, [r1], #1)			@ May fault
-		strb	r3, [r0], #1
-USER(	TUSER(	ldrgeb) r3, [r1], #1)			@ May fault
-		strgeb	r3, [r0], #1
-USER(	TUSER(	ldrgtb) r3, [r1], #1)			@ May fault
-		strgtb	r3, [r0], #1
-		b	.Lcfu_finished
-
-.Lcfu_not_enough:
-		movs	ip, r2
-		bne	.Lcfu_nowords
-.Lcfu_finished:	mov	r0, #0
-		add	sp, sp, #8
-		ldmfd	sp!, {r4 - r7, pc}
-
-.Lcfu_src_not_aligned:
-		bic	r1, r1, #3
-USER(	TUSER(	ldr)	r7, [r1], #4)			@ May fault
-		cmp	ip, #2
-		bgt	.Lcfu_3fupi
-		beq	.Lcfu_2fupi
-.Lcfu_1fupi:	subs	r2, r2, #4
-		addmi	ip, r2, #4
-		bmi	.Lcfu_1nowords
-		mov	r3, r7, pull #8
-USER(	TUSER(	ldr)	r7, [r1], #4)			@ May fault
-		orr	r3, r3, r7, push #24
-		str	r3, [r0], #4
-		mov	ip, r1, lsl #32 - PAGE_SHIFT
-		rsb	ip, ip, #0
-		movs	ip, ip, lsr #32 - PAGE_SHIFT
-		beq	.Lcfu_1fupi
-		cmp	r2, ip
-		movlt	ip, r2
-		sub	r2, r2, ip
-		subs	ip, ip, #16
-		blt	.Lcfu_1rem8lp
-
-.Lcfu_1cpy8lp:	mov	r3, r7, pull #8
-		ldmia	r1!, {r4 - r7}			@ Shouldnt fault
-		subs	ip, ip, #16
-		orr	r3, r3, r4, push #24
-		mov	r4, r4, pull #8
-		orr	r4, r4, r5, push #24
-		mov	r5, r5, pull #8
-		orr	r5, r5, r6, push #24
-		mov	r6, r6, pull #8
-		orr	r6, r6, r7, push #24
-		stmia	r0!, {r3 - r6}
-		bpl	.Lcfu_1cpy8lp
-
-.Lcfu_1rem8lp:	tst	ip, #8
-		movne	r3, r7, pull #8
-		ldmneia	r1!, {r4, r7}			@ Shouldnt fault
-		orrne	r3, r3, r4, push #24
-		movne	r4, r4, pull #8
-		orrne	r4, r4, r7, push #24
-		stmneia	r0!, {r3 - r4}
-		tst	ip, #4
-		movne	r3, r7, pull #8
-USER(	TUSER(	ldrne) r7, [r1], #4)			@ May fault
-		orrne	r3, r3, r7, push #24
-		strne	r3, [r0], #4
-		ands	ip, ip, #3
-		beq	.Lcfu_1fupi
-.Lcfu_1nowords:	mov	r3, r7, get_byte_1
-		teq	ip, #0
-		beq	.Lcfu_finished
-		cmp	ip, #2
-		strb	r3, [r0], #1
-		movge	r3, r7, get_byte_2
-		strgeb	r3, [r0], #1
-		movgt	r3, r7, get_byte_3
-		strgtb	r3, [r0], #1
-		b	.Lcfu_finished
-
-.Lcfu_2fupi:	subs	r2, r2, #4
-		addmi	ip, r2, #4
-		bmi	.Lcfu_2nowords
-		mov	r3, r7, pull #16
-USER(	TUSER(	ldr)	r7, [r1], #4)			@ May fault
-		orr	r3, r3, r7, push #16
-		str	r3, [r0], #4
-		mov	ip, r1, lsl #32 - PAGE_SHIFT
-		rsb	ip, ip, #0
-		movs	ip, ip, lsr #32 - PAGE_SHIFT
-		beq	.Lcfu_2fupi
-		cmp	r2, ip
-		movlt	ip, r2
-		sub	r2, r2, ip
-		subs	ip, ip, #16
-		blt	.Lcfu_2rem8lp
-
-
-.Lcfu_2cpy8lp:	mov	r3, r7, pull #16
-		ldmia	r1!, {r4 - r7}			@ Shouldnt fault
-		subs	ip, ip, #16
-		orr	r3, r3, r4, push #16
-		mov	r4, r4, pull #16
-		orr	r4, r4, r5, push #16
-		mov	r5, r5, pull #16
-		orr	r5, r5, r6, push #16
-		mov	r6, r6, pull #16
-		orr	r6, r6, r7, push #16
-		stmia	r0!, {r3 - r6}
-		bpl	.Lcfu_2cpy8lp
-
-.Lcfu_2rem8lp:	tst	ip, #8
-		movne	r3, r7, pull #16
-		ldmneia	r1!, {r4, r7}			@ Shouldnt fault
-		orrne	r3, r3, r4, push #16
-		movne	r4, r4, pull #16
-		orrne	r4, r4, r7, push #16
-		stmneia	r0!, {r3 - r4}
-		tst	ip, #4
-		movne	r3, r7, pull #16
-USER(	TUSER(	ldrne) r7, [r1], #4)			@ May fault
-		orrne	r3, r3, r7, push #16
-		strne	r3, [r0], #4
-		ands	ip, ip, #3
-		beq	.Lcfu_2fupi
-.Lcfu_2nowords:	mov	r3, r7, get_byte_2
-		teq	ip, #0
-		beq	.Lcfu_finished
-		cmp	ip, #2
-		strb	r3, [r0], #1
-		movge	r3, r7, get_byte_3
-		strgeb	r3, [r0], #1
-USER(	TUSER(	ldrgtb) r3, [r1], #0)			@ May fault
-		strgtb	r3, [r0], #1
-		b	.Lcfu_finished
-
-.Lcfu_3fupi:	subs	r2, r2, #4
-		addmi	ip, r2, #4
-		bmi	.Lcfu_3nowords
-		mov	r3, r7, pull #24
-USER(	TUSER(	ldr)	r7, [r1], #4)			@ May fault
-		orr	r3, r3, r7, push #8
-		str	r3, [r0], #4
-		mov	ip, r1, lsl #32 - PAGE_SHIFT
-		rsb	ip, ip, #0
-		movs	ip, ip, lsr #32 - PAGE_SHIFT
-		beq	.Lcfu_3fupi
-		cmp	r2, ip
-		movlt	ip, r2
-		sub	r2, r2, ip
-		subs	ip, ip, #16
-		blt	.Lcfu_3rem8lp
-
-.Lcfu_3cpy8lp:	mov	r3, r7, pull #24
-		ldmia	r1!, {r4 - r7}			@ Shouldnt fault
-		orr	r3, r3, r4, push #8
-		mov	r4, r4, pull #24
-		orr	r4, r4, r5, push #8
-		mov	r5, r5, pull #24
-		orr	r5, r5, r6, push #8
-		mov	r6, r6, pull #24
-		orr	r6, r6, r7, push #8
-		stmia	r0!, {r3 - r6}
-		subs	ip, ip, #16
-		bpl	.Lcfu_3cpy8lp
-
-.Lcfu_3rem8lp:	tst	ip, #8
-		movne	r3, r7, pull #24
-		ldmneia	r1!, {r4, r7}			@ Shouldnt fault
-		orrne	r3, r3, r4, push #8
-		movne	r4, r4, pull #24
-		orrne	r4, r4, r7, push #8
-		stmneia	r0!, {r3 - r4}
-		tst	ip, #4
-		movne	r3, r7, pull #24
-USER(	TUSER(	ldrne) r7, [r1], #4)			@ May fault
-		orrne	r3, r3, r7, push #8
-		strne	r3, [r0], #4
-		ands	ip, ip, #3
-		beq	.Lcfu_3fupi
-.Lcfu_3nowords:	mov	r3, r7, get_byte_3
-		teq	ip, #0
-		beq	.Lcfu_finished
-		cmp	ip, #2
-		strb	r3, [r0], #1
-USER(	TUSER(	ldrgeb) r3, [r1], #1)			@ May fault
-		strgeb	r3, [r0], #1
-USER(	TUSER(	ldrgtb) r3, [r1], #1)			@ May fault
-		strgtb	r3, [r0], #1
-		b	.Lcfu_finished
-ENDPROC(__copy_from_user)
-
-		.pushsection .fixup,"ax"
-		.align	0
-		/*
-		 * We took an exception.  r0 contains a pointer to
-		 * the byte not copied.
-		 */
-9001:		ldr	r2, [sp], #4			@ void *to
-		sub	r2, r0, r2			@ bytes copied
-		ldr	r1, [sp], #4			@ unsigned long count
-		subs	r4, r1, r2			@ bytes left to copy
-		movne	r1, r4
-		blne	__memzero
-		mov	r0, r4
-		ldmfd	sp!, {r4 - r7, pc}
-		.popsection
-